Air register for fuel burners



Feb. 27, 1934. E. H. PEABODY AIR REGISTER FOR FUEL BURNERS Filed April20, 1931 2 Sheets-Sheet 1 FleA- Z M #1! VEN TOR.

ATT RNEYS.

Feb. 27, 1934. PEABQDY 1,948,627

AIR REGISTER FOR FUEL BURNERS Filed April 20, 1951 2 Sheets-Sheet 2 LEFTHAND RlGHT HAND I INVENTOR. 1 W

AT RNEYS.

Patented Feb. 27, 1934 UNITED STATES PATENT OFFICE AIR REGISTER FOR FUELBURNERS Ernest H. Peabody, New York, N. Y., assignor to PeabodyEngineering Corporation, New York, N. Y., a corporation of New York Thepresent invention relates to air registers for fuel burners.

A turbulent condition in a furnace greatly promotes the efiicient andrapid combustion of fuel. l This turbulence or turbulent movement of thegases of combustion may be brought about by imparting to the airadmitted with the fuel a rapid rotating motion, and special airregisters for accomplishing this are well known in the art. Also it isfrequently desirable to use a combination on one furnace of registerswhich rotate the air in a clockwise direction and those which rotate theair in a counter clockwise direction, as shown in Patent No. 1,508,718granted to the applicant September 16, 1924 on Apparatus for burningliquid fuel.

Heretofore air registers which rotate the air in a clockwise directionhave been provided with operating mechanism which opens the air regis-,zo ter doors by a predetermined movement in a given direction while theregisters which rotate the air in a counter clockwise direction open thedoors by an opposite movement of the operating mechanism. This requiresthe special manufacture of right hand or left hand registers andnecessitates care and attention on the part of the operator who has tokeep track of which registers give a clockwise and which give a counterclockwise rotation of air;

The principal object of the present invention is to provide an operatingmechanism which by a movement in a predetermined direction (preferablycounter clockwise) will open all registers whether they give a righthandor left hand rotation of air, and which will close allregisters byan opposte movement. In this case the operator does not need to evenknow which registers create an air rotation one way or the other, andhis work of adjusting the air for combustion is greatly simplifiedandmade more efficient.

Another important object of the invention is to construct an airregister which by a mere adjustment of parts may be made to give the aira rotation one way or the. other. The fact that all parts are similar,no matter which type of register is required greatly simplifies andcheapens manufacture.

Still another object is to give the designing engineer or operator aready means for changing the combination of right and left rotationalregisters on a furnace and by experiment determine the most effectivearrangement.

The foregoing and other objects of the invention will be understood byreference to the following description taken in connection accompanyingdrawings in which Fig. 1 is a central verticalsection; Fig. 2 anenlarged detail section on the same plane. as that of Fig. 1 showing themanner of supporting and the mechanism for operating the register doors;Fig. 3 is an elevation looking in the direction of the arrow in Fig. 1with the front plate of the register removed and showing all but one ofthe doors in closed position; Fig, '4 is a view similar to Fig. 3showing the open door turned in a direction opposite to the position ofthe open door in Fig. 3; Figs. 5. and 6 are detail views, in elevationat right angles to the doors with the door operating pin engaging itsslot in the cam plate and showing the door in closed and open positions,respectively; and Figs. 7 and 8 are views similar to Figs. 5 and 6showing a door with its operating pin engaging another slot in the camplate to effect a movement of the door in a direction opposite to thatof Figs. 5 and 6. Similar'reference numerals indicate similar parts inthe several views. Fig. 9 shows a front elevational view of a portion ofa furnace front, the furnace being provided with a plurality of fuelburners and air registers with certain registers arranged to open in onedirection and other registers arranged to open in the opposite directionand with the register operating means for each of the various registersmoving in the samedirection for effecting opening movement of registers,some of which open in one direction and others of which openin theopposite direction.

Referring to Figs. 1 to 4, the front plate of the register consists of ahollow box-like structure having walls 1 and 2. It may be made up ofstructural shapes or as a casting, and is hollow to receive a filling ofheat insulating material. Wall 1 is formed with an opening closed by acover plate 3 having itself an opening to receive a hub 4 adapted toreceive a fuel burner. cover plate also has an opening. for a peep holeand a rodding hole, as usual in registers of this general type. Wall 2has a centrally located opening therein, as shown in Figs. 1 and 2. Theback plate 5 of the register has an internal diameter greater than thediameter of the openin in the wall 2 of the front plate.

Between the flange 5' of plate 5 and wall 2 of the front plate, arehinge bolts 6. These are threaded at one end into openings in the wall2, and at the other end pass through flange 5'. The front and backplates are thus held firmly together by the bolts. Pipe sleeves orspacers 7 surround the bolts 6 and are clamped tight against wall 2 ofthe front plate by the hinge The 9 bolts. The bolts 6 serve as hingesfor the doors 8. The number of doors may vary as conditions require. Thepresent register is shown as having eight doors all similar inconstruction and operating by similar mechanisms, as hereinafterdescribed. The doors 8 are curved sections of a cone and are of suchlength'that when closed they form a frustumv of a cone, with. their endsoverlapping.

The doors 8 are secured at their front ends to the flanges 9 of anglecam plates, the other, flanges 9 of which have an opening ,to receivethe lower ends of spacers '7.

To move the doors simultaneously from'closed to open position in eithera clockwiseona. counter clockwise direction, according to whether. the:entering air is to be given a. whirling motion in.

a corresponding direction, the flange 9 of each of the cam plates isformed with two slots 1T7" and 18 through which the desired movement ofthe doors is effected byan operating mechanism.

comprising a shaft 11 onthe inner end' of' which is a pinion 12 whichmeshes with an internal rack 14- on a ringl l. The latter is heldloosely against the section 2 of the wall 2 to permit it to be rotatedin a plane'at'right angles to the axis of the register; Rotation ofthering is effected manually by a crank handle 15 on' the-outer end ofshaft 11.

As shown in Figs. 1 and 2, the outer face of the ring is-bevelled tolieparallel with flange 9 of the camplate. Secured'to' ring 14'and'projecting beyond the plane of its bevelled face are pins 16', onefor each door. These pins may be set to engage either the slots 17 orthe slots 18. The slots 17 have straight walls, whilesthose of slots 18are arcs of circles. The opening and closing. of doors is effected inthe manner now tobe described.

It will be noted that in the present construction the doors 8' lieoutside of the. hinge bolts 6, and that the flanges or'cam plates 9 areat right angles to' and lie inside of the doors; This permits'the use ofa sufficiently smallcam plate to prevent interference betweenthe camplate of one: door and that of the adjacent door.

Operation Assume first that the: doors of a given register are to beopened by moving themiin a clockwise directionso. that the airforcombustion will be caused to rotate in the same direction. The ring14. is. adjusted to: set all of the pins 16in the extreme lower end ofthe correspondingv slots 1'7. In such adjustment, the pins will befurthest away from thecenter of rotation of the doors, and the pinion 12will be at the upper end of the rack 14. The doors must, of course,rotate about the fixed axes of their hinge bolts 6 and as thelongitudinal axes'of slot 17 are inclined to the center-of rotation ofthe doors, the pressure of the pins 16 against the left hand wall ofslots 1'7, upon the rotation of ring 14 byturning crank 15 in a counterclockwise direction, will cause the doors to move from their closedposition indic'ated in Fig. 5 to open position indicated in Fig. 6.During such rotation of ring 14 the pins 16 will travel along the arcsmm struck from the center of ring-14. As the doors are moved about theiraxes, slots 1'7 will move from a position above said arcs to a positionbelow them.

To close the doors, crank handle 15 is turned in a. clockwise directionand the return movement of pins 16 along their slots willleffect thedesired movement of' the doors. The doors may, of

course, be adjusted to any position intermediate their extreme positionsaccording to the volume and the velocity of the air for combustiondesired for any given type of burner.

When the doors are to be opened in a counter clockwise direction so thatthe air for combustion will be rotated in'the same direction'as thedoors are. opened, the. hinge bolts. 6 are unscrewed from their seats inthe wall 2 of the front plate sufficiently to allow the doors to beraised to permit the cam plates 9 to clear pins 16. Ring 1% is thenshifted to set all of the pins 16 in the extreme right hand end of slots18, that is, at. the limit of their movement furthest away from thecenter of rotation of the doors, as indicated, in Fig. .7. In suchposition the pinion 12 is at the upper. end of the rack 14.

The walls of slots 18 are arcs of circles struck from-a. centereccentric to the axes of the hinge bolts and also to the center of ring14:, so that when crank handle 15 is turned counter clockwise, that is,in the same direction as when opening the doors to givea clockwiserotation to the combustion air, pins lfi'willbe moved on the arcsn-n.along their slots to the limit of their movement at the other end ofthe slots, or to any intermediateposition, to effect the desired openingof the. doors. The reverse movement of the crank handle will effect theclosing of the doors by a reverse. movement of the pins 15 along the 1slots.

Ifdesired to open only some of the doors, it is only necessary to removethe pins 16 of those doors which are to remain closed. In thisway onlyalternate doors may be opened, or any numher from one to the fullcapacity of the register.

It will be noted. that whether the doors are to be opened in'a clockwiseor in a counter clockwise direction, crank handle 15 is always manuallyoperated in acounter clockwise direction. This avoids confusion onthexpart of the operator as towhichiway the handle is tobe turned as wasfrequently the case when the doors were capable of movement in onedirection only. Ac-

cording to the present construction, in whichever l of the slots thepins 16 are set, the operator knows that thehandle 15 is always to beturned in a counter clockwise direction to effect the opening of thedoors;

The described construction also enables the desired adjustment: to bemade, or to be changed registers are similar in construction and thusavoids the necessity of fabricating more than one type.

In Fig. 9 the direction of the opening movement of the various registersis shown by the outer arrows and the direction of opening movement ofthe operating means for the registers is shown by the inner arrows' Theregisters are shown'in wide open position. To close the registers theoperating means would be moved in reverse direction to the direction inwhich the y] The direction of closing inner arrows point. movement ofthe registers would be the reverse of the direction indicated by theouter arrows. It will be noted that some of the outer arrows point inone direction and some point in the opposite direction, while all of theinner arrows point in the same direction.

What I claim is:

1. In combination with a furnace, a plurality of fluent fuel burners, anair register for each burner, each register having adjustable doors forcontrolling the volume and the direction of rotation of air currents fedto its burner, the doors of some of the registers being arranged torotate the air currents in one direction and the doors of the rest ofthe registers being arranged to rotate the air currents in the oppositedirection, operating means at each register to move the doors of suchregister, all of said operating means being movable in the samepre-determined direction to open and in the opposite direction to closethe doors of all registers.

2. An air register for controlling the volume and the direction ofrotation of air fed, comprising an annular series of pivotally mounteddoors constructed to be optionally assembled for either clockwise orcounterclockwise opening movement, means for operating said doorscomprising an operating member and means to connect said operatingmember to said doors so constructed that said operating member moves inthe same direction in opening said doors whether the doors are assembledfor clockwise or counterclockwise opening movement.

3. The invention set forth in claim 2 in which the means to connect theoperating member to the doors comprises selectively inter-engageablemeans intermediate the operating member and the doors arranged forselective relation to the doors according to whether the doors areassembled for clockwise opening movement or counterclockwise openingmovement.

4. The invention set forth in claim 2 in which the means to connect theoperating member to the doors comprises multiple cams secured to each ofthe doors, and means selectively engageable with said multiple cams.

5. An air register for controlling the volume j and direction of airfed, comprising an annular series of pivotally mounted doors constructedto be optionally assembled for either clockwise or counterclockwiseopening movement in combination with operating apparatus for said doors,comprising multiple cams secured to each of said doors, one cam being atan angle to the other cam on each door and both cams being eccentric tothe axis of rotation of an associated door, and operating meansengageable with one or the other of said sets of cams and when relatedwith one set arranged to effect opening movement of doors assembled forclockwise opening movement and when related with the other set arrangedto effect 7 opening movement of doors which are assembled forcounterclockwise opening movement, said operating means and said camsbeing so constructed and interconnected with said operating means movesin the same direction in opening said doors whether the doors areassembled for clockwise or counterclockwise opening movement.

6. Operating apparatus applicable to an air register having doorsconstructed to be optionally assembled for either clockwise orcounterclockwise opening movement, said operating apparatus comprisingan operating means movable always in the same direction for opening thedoors irrespective of whether the doors are open clockwise orcounterclockwise, and connections therefrom to the doors to be opened toselectively impart a clockwise opening movement to doors assembled orclockwise opening movement or to impart a counterclockwise movement todoors assembled for counterclockwise opening movement, said connectionsincluding means so that the operating means moves in the same directionin opening said doors whether the doors so assembled are for clockwiseor counterclockwise opening movement.

'7. Operating apparatus applicable to an air register having doorsconstructed to be assembled for either clockwise or counterclockwiseopening movement, said operating apparatus comprising a cam memberassociated with each door and provided with multiple carnming surfaces,one surface being adapted for use for doors assembled to open with aclockwise opening movement and the other surface being adapted for doorsassembled to open with a counterclockwise rotational movement, and acommon operating member with provisions for selective association witheither of the sets of carnming surfacesaccording to the desireddirection of opening movement to be imparted to a set of doors, saidopening means and carnming surfaces being so related that the operatingmember moves in the same direction in opening said doors Where the doorsare assembled for clockwise or counterclockwise opening movement andupon the associating of the operating member with one or the other setsof carnming surfaces.

' ERNEST H. PEABODY.

CERTIFICATE OF GORREGTEONQ Patent No. 1,948, 627. February 27, 1934.

ERNEST H. PEAifiDY.

It hereby certified that error appears in the prinieti seeeiiieation ofthe above numbered patent requiring eorreetien as fellows: iage 3, line83, claim 5, ier "with" read that; and that the said Letters Patentshould he read with this correction therein that the same may conform tothe record 01 the case in the Patent Office.

Signed and sealed this 20th day of March, A. D. i934.

F. M. Hopkins (Seal) Acting Commissiener of Patents.

